A fannin bututun mai,API 5Lshine mizani da ke haɗa komai wuri ɗaya. Amma idan ka duba dalla-dalla a kan takamaiman bayanai, ba takarda ce ta "girma ɗaya ta dace da kowa ba". Zaɓar tsakaninAPI 5L Grade Bda kumaAPI 5L X70, ko kuma yanke shawara ko wani aiki yana buƙatar PSL2, shine inda injiniyan ke samun wahala.
Tushen Bayani: PSL1 da PSL2
Shawara ta farko a kowace hanyar siye ita ce Matakin Bayyana Samfura.API 5L PSL1Yana da kyau ga aikace-aikacen yau da kullun, API 5L PSL2 wani abu ne daban gaba ɗaya. An tsara shi ne don muhalli inda akwai babban haɗari, kamar layukan iskar gas mai matsin lamba ko dandamali na ƙasashen waje.
| Fcin abinci | PSL1 | PSL2 |
|---|---|---|
| Gwajin Tasirin CVN na Dole | No | Ee |
| Rufin Ƙarfin Ba da Lamuni | Babu | Dole (Iyakan ƙarfi fiye da kima) |
| Matsakaicin Yawan Yawa | Babu | Yawanci 0.93 |
| Bin diddigin abubuwa | Na asali | Ana Bukatar Cikakken Bin Diddigin Abubuwan da Aka Bi |
| Layin Walda NDT | Na asali | Dole ne (Radiographic ko Ultrasonic) |
Sinadarin Halitta: Ci gaba Fiye da "Tsarkaka"
Idan mutane suna magana game da "ingancin" PSL2, yawanci suna magana ne game da sinadarai. Iyakokin Phosphorus da Sulfur sun fi tsauri a cikin PSL2 saboda waɗannan ƙazanta sune ke haifar da gazawa a fagen.
Ga yadda ilmin sunadarai ke rushewa don wasu maki na gama gari:
| Sinadarin (Matsakaicin %) | PSL1: Darasi na B | PSL2: Darasi na B | PSL2 X70 |
|---|---|---|---|
| Carbon (C) | 0.26 | 0.22 | 0.22 |
| Manganese (Mn) | 1.20 | 1.20 | 1.65 |
| Phosphorus (P) | 0.030 | 0.025 | 0.025 |
| Sulfur (S) | 0.030 | 0.015 | 0.015 |
Abu ɗaya da za a kula da shi shine CEV. A cikin PSL2, CEV ba shawara ba ce kawai; iyaka ce mai tauri wadda ke tabbatar da cewa ana iya haɗa bututun a cikin filin ba tare da fashewa ba. Idan carbon ɗin ya yi ƙasa sosai, injin niƙa zai canza zuwa dabarar Pcm don ba da cikakken hoto na iya yin walda.
Aikin Inji da Ƙarfi
Sunan ma'aunin yana nuna maka mafi ƙarancin ƙarfin fitarwa. Bututun X52 yana da mafi ƙarancin yawan fitarwa na psi 52,000. Amma a cikin PSL2, ƙarfin fitarwa na "matsakaicin" yana da mahimmanci kamar mafi ƙarancin. Idan bututun ya yi tauri ko ya yi ƙarfi sosai, yana rasa ƙarfin da ake buƙata don sarrafa motsi na ƙasa ko hauhawar matsin lamba.
| Matsayi | Ƙaramin Yawa (MPa) | Matsakaicin Yawa (MPa) | Ƙaramin Tashin Hankali (MPa) | Matsakaicin Tashin Hankali (MPa) |
|---|---|---|---|---|
| Aji na B | 245 | 450 | 415 | 760 |
| X52 | 360 | 530 | 460 | 760 |
| X60 | 415 | 565 | 520 | 760 |
| X70 | 485 | 635 | 570 | 760 |
Gwajin Matsi: Tsarin Hydrostatic
Kowace haɗin bututun API 5L dole ne ya wuce gwajin hydro-test. Wannan ita ce babbar shaida cewa injin niƙa ya yi aikinsa. Matsin da aka yi amfani da shi ba lamba ce ta bazata ba; an ƙididdige shi ne bisa ga halayen bututun ta amfani da dabarar da ke ƙasa:
A cikin wannan lissafin,Pshine matsin lamba na gwaji,tkauri ne na bango, kumaDshine diamita na waje. Mai canzawaSyana wakiltar matsin lamba na zare, wanda yawanci yake tsakanin kashi 60% zuwa 90% na ƙarancin ƙarfin samar da bututun da aka ƙayyade. Ga PSL2, ana ɗaukar gwajin na tsawon lokaci don tabbatar da cewa haɗin walda yana da cikakken daidaito.
Sabis Mai Tsami
Idan bututun ku yana ɗauke da iskar gas mai "mai tsami" (H)2S), ma'aunin da aka saba amfani da shi ba zai rage shi ba. Dole ne ku nemi ƙarin bayani na "MS" ko "NS", kamar X52MS. Ana yin gwajin HIC ga waɗannan bututun. Sinadarin da ke nan ya fi tsanani, inda matakan Sulfur sau da yawa ke raguwa zuwa 0.003% don hana iskar gas cinye ƙarfe daga ciki zuwa waje.
Nasiha Kan Dubawa Mai Amfani
Lokacin da kake auna bututun, ka tuna cewa API 5L yana ba da damar ɗan haƙuri akan kauri na bango. Duk da haka, ga PSL2, waɗannan juriya sun fi tauri. Yi amfani da ma'aunin kauri na ultrasonic wanda aka daidaita kuma ka tabbata ba ka auna daidai a gefen yanke inda zaren ya bar buro. Samun ingantaccen karatu daga ƙarshen bututun shine kawai hanyar da za ka tabbatar kana samun ƙarfen da ka biya.
Lokacin Saƙo: Afrilu-28-2026
